Is your daughter affected from tonsillitis
often? - usually, frequent tonsillitis infection is associated with rheumatic diasease which can partially explain your daughter's body aches.
Therefore, If this is her case, I recommend to check with her ENT specialist
if any rheumatologist
evaluation is needed.
Next, if your daughter has the symptoms of flu, most probably virosis might be the cause of her body aches. Give her plenty of fluids, water especially, and tea, give some over-the-counter pain killers and get her sleep well and get rest.
With regards to black bumps which turn red with white head, most probably it might be of a skin infection
, for which oral and topical treatment is needed. I recommend to do the culture of the discharge coming out from the "white headed bumps" and talk to dermatologist
for the follow up as I do not have the picture of your problems.